Let's hear it for a new web site. Hopefully, one that goes viral:
http://catchalooter.tumblr.com/
They say:
Collating all images of looters from the London Riots.
Get me on @CatchaLooter.
If you recognise anyone, contact Crimestoppers on 0800 555 111, or preferably via
https://secure.crimestoppers-uk.org/ams.form.anonymous.asp
This site does not support vigilante action; merely using social media to collate all images in one place.
Use CTRL mouse wheel to zoom up the browser pictures, and email me on CatchALooter@gmail.com